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Definition of logarithm

logarithm

/ˈlɑː.ɡə.rɪð.əm/
log · a · rithm
Adverb:logarithmically
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Plural:logarithms
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Adjective:logarithmic
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logarithm Lexical Profile

logarithm Game Scores & Validity

• noun

1

A quantity representing the power or exponent to which a fixed number (the base) must be raised to produce a given number.

Example

"Because the Richter scale uses a base-ten logarithm, an earthquake of magnitude 6 releases ten times the wave amplitude of a magnitude 5 quake."

Synonyms
View all synonyms for logarithm
Antonyms
View all antonyms for logarithm

Word Nuance & Usage

Do not confuse 'logarithm' (the mathematical exponent or power to which a base is raised) with 'algorithm' (a step-by-step computational procedure for solving a problem).

• Nearby Words

log
logan
loganberry
logarithm
logbook
loge
logger

Word Origin & Etymology

Coined in 1614 as Modern Latin 'logarithmus' by Scottish mathematician John Napier, combining Ancient Greek 'logos' (proportion, ratio) and 'arithmos' (number).

Cite this Entry

Wordmom. (2026). Definition of Logarithm. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/logarithm
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